Improvement in door-springs



UNITED STATES PATENT OFFIoE.

THOMAS W. HILL, OF ST. CHARLES, MINNESOTA, ASSIGNOR OF ONE-HALF HISRIGHT TO GEORGE P. MILLIS, OF OSOEOLA, IOWA.

IMPROVEMENT IN DOOR-SPRINGS.

Specification forming part of Letters Patent No. 2 [3,199, dated March1], 1879; application filed February 1, 1879.

To all whom it may concern:

Be it known that I, THOMAS W. HILL, of

St. Charles, in the county of Winona, and in the State of Minnesota,have invented certain new and useful Improvements in Door-Sprin gs anddo hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, making a part of thisspecification.

The nature of my invention consists in the peculiar construction andarrangement of a device to be attached to doors for closing the same, aswill be hereinafter more particularly described.

To enable those skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

. 1n the accompanying drawings, making part of this specification,Figure 1 represents a perspective view of a portion of a door-frame withdevice attached Figs. 2, 3, and 4 are views of detached portions.

In the figures, A represents the frame of a door. To the uppercross-piece, B, of the frame is secured a metallic box, 0. Through thisbox is passed a shaft, E, and around this shaft is placed a coiledspring, e.

The shaft E is square at one end, and provided with a loop at the other.It is also grooved its entire length on two sides. It is made square atthe end, so that a wrench may take hold of it to regulate the tension ofthe spring; and it is provided with a loop, sothat a lever may catchinto it for connecting it to the door.

One end of the coiled spring is bent so that it will enter one of thegrooves in the shaft, while the other end of said spring catches againstthe side of the case or box.

It will readily be seen that the shaft can be reversed without removingthe spring when it is desirable to change the box from a right to a lefthand door.

F represents a lever, one end of which catches in a loop or eye which issecured to the door. The other end of the lever is provided with twoprongs, d and a. The prong (Z forms a hook, while a socketj-is'jjormediu the end of the prong a. The prong d catches into the loop uponjshaftE on one side, while the other side of said loop rests in the socket ofprong a.

XVhcn the door is being opened these two prongs, acting upon shaft E,cause torsion of the spring 0, and the tendency is to force it closed,as is usual in this class of springs.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

In combination with the box 0 and pronged lever F, the shaft E, withloop at one end,

square at the other, and provided with two or more grooves, andsurrounded with the coiled spring 6, substantially as and for thepurpose specified. 7

I11 testimony that I claim the foregoing I have hereunto set my handthis 22d day of January, 1878.

THOS. W. HILL.

Witnesses H. W. GAGE, THOMAS MIOHELL.

